/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.aliyun.odps.local.common;

import java.io.File;

import com.aliyun.odps.Column;
import com.aliyun.odps.OdpsType;

public class FileSplit {

  public static final FileSplit NullSplit = new FileSplit(null, new Column[]{new Column("nil",
                                                                                        OdpsType.STRING)},
                                                          0, 0);
  private File file;
  private Column[] schema;
  private long start;
  private long length;

  FileSplit() {
  }

  /**
   * Constructs a split with host information
   *
   * @param file
   *     the file name
   * @param start
   *     the position of the first byte in the file to process
   * @param length
   *     the number of bytes in the file to process
   */
  public FileSplit(File file, Column[] schema, long start, long length) {
    this.file = file;
    this.schema = schema;
    this.start = start;
    this.length = length;
  }

  /**
   * The file containing this split's data.
   */
  public File getFile() {
    return file;
  }

  public Column[] getSchema() {
    return schema;
  }

  /**
   * The position of the first byte in the file to process.
   */
  public long getStart() {
    return start;
  }

  /**
   * The number of bytes in the file to process.
   */
  public long getLength() {
    return length;
  }

  public String toString() {
    return file + ":" + start + "+" + length;
  }

}
